A complex investigation of the nanofluids R600а-mineral oil-AL 2 O 3  and R600а-mineral oil-TiO 2 . Thermophysical properties

Zhelezny, Vitaly; Лукьянов, Николай Николаевич; Khliyeva, Olga; Нікуліна, А.С.; Melnyk, A.V.

doi:10.1016/j.ijrefrig.2016.11.008

Cited by 43 publications

(9 citation statements)

References 26 publications

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“…for nanofluids is lack of information about its pseudocritical pressure. But as was shown in [5] the additives of nanoparticles do not lead to significant variation in pseudocritical pressure. Therefore as an assumption we use the constant value of pseudocritical pressure equal the value for pure base fluid.…”

Section: Figure 11 -Relationship Between φ and π For Some Hydrocarbonmentioning

confidence: 79%

“…This makes possible to predict the surface tension of nanofluids in a wide temperature range using available information on the saturated vapor pressure. In our further research we are going to evaluate pseudocritical temperature and pressure for nanofluid isopropanol/Al 2 O 3 and solution o-xylene/C 60 with using the methodology [5] and estimate functional relationship between surface tension and saturated vapor pressure for the studied nanofluids.…”

Section: Figure 11 -Relationship Between φ and π For Some Hydrocarbonmentioning

confidence: 99%

“…Recently, we can note increasing the interest in studying the prospects of nanofluids as working fluids of vapor compression refrigeration equipment (solution of refrigerant/compressor oil/nanoparticles) and as coolants (heat transfer fluids containing nanoparticles) [1][2][3][4][5]. Therefore, the problem of experimental investigation and predicting of nanofluids thermophysical properties promising for refrigeration is of current importance.…”

Section: Introductionmentioning

confidence: 99%

“…There is some progress in predicting the surface tension of various mixtures using the thermodynamic approach [11,20,21]. There are some studies dedicated predicting the surface tension of mixtures refrigerants and solutions of refrigerant in compressor oil [5,7,22,23], that we are interested in. But studies dedicated predicting the surface tension of nanofluids are absence at present.…”

Section: Introductionmentioning

confidence: 99%

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The relationship between the surface tension and the saturated vapor pressure of model nanofluids

Khliyeva

Ivchenko

Khanchych

et al. 2019

RET

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Information on surface tension is necessary for modeling boiling processes in nanofluids. It was shown that the problem of predicting the surface tension of complex thermodynamic systems, such as nanofluids, remains outstanding. It should be noted that the surface tension of liquids and the saturated vapor pressure are due to a specific intermolecular interaction in the region of spatial heterogeneity of the substance (surface layer). Moreover, the compositions of the surface layer of nanofluid and its liquid phase are not equal. The presence of nanoparticles in the base fluid affects the composition of the surface layer of liquids. However, there are no methods for determining the composition of the surface layer of nanofluids and this fact complicates establishing the dependence of the surface tension on the state parameters of nanofluids. It should be mentioned that the number of possible methodological errors in measurements of the saturated vapor pressure of nanofluids is significantly lower than for the surface tension measurements. Therefore, in the development of models for predicting the surface tension, scientific and practical interest has establishing the relationship between the surface tension and the saturated vapor pressure of nanofluids. In the presented work, we consider the nanofluids of isopropanol/Al 2 O 3 nanoparticles and o-xylene/fullerenes C 60 . Saturated vapor pressure and surface tension of nanofluids of isopropanol/Al 2 O 3 nanoparticles have been studied in the temperature range 293 -363 K and concentrations of Al 2 O 3 nanoparticles 0-8.71 g/kg. Measurement of saturated vapor pressure and surface tension of nanofluids of o-xylene/fullerenes C 60 have been performed in the temperature range 283 -348 K and the concentration of C 60 0-7.5 g/kg. It is shown that additives of Al 2 O 3 nanoparticles and fullerenes C 60 lead to a decrease in the surface tension and increase in the saturated vapor pressure. It is shown that there is a universal dependence between the reduced surface tension and saturated vapor pressure for the researched nanofluids.

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Section: Figure 11 -Relationship Between φ and π For Some Hydrocarbonmentioning

confidence: 79%

Section: Figure 11 -Relationship Between φ and π For Some Hydrocarbonmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The relationship between the surface tension and the saturated vapor pressure of model nanofluids

Khliyeva

Ivchenko

Khanchych

et al. 2019

RET

View full text Add to dashboard Cite

show abstract

“…The studies [20] show that nanoparticles are not significantly affect the value of the pseudocritical temperature. In addition, colloidal solutions are characterized by low thermal stability.…”

Section: Introductionmentioning

confidence: 90%